package cn.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor implements HandlerInterceptor {

   public boolean preHandle(HttpServletRequest request,
                              HttpServletResponse response,
                              Object handler) throws Exception {
        Object user = request.getSession().getAttribute("cnUser");
        if (user == null) {
                response.sendRedirect(request.getContextPath() + "/login");
                return false;
        }
        return true;
    }

}
